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What is in the contrails that jets leave in the sky?

The Aircraft Contrails Factsheet, states that contrails are line-shaped clouds or “condensation trails,” composed of ice particles which are visible behind jet aircraft engines, typically at cruise altitudes in the upper atmosphere.  You can learn more about contrails, including their formation and environmental effects in the Aircraft Contrails Factsheet found at the following URL: http://www.epa.gov/otaq/regs/nonroad/aviation/430f00005.pdf 

Additional detailed information on aircraft emissions can be found in an EPA report, "Evaluation of Air Pollutant Emissions from Subsonic Commercial Jet Aircraft" (April 1999): http://www.epa.gov/otaq/regs/nonroad/aviation/r99013.pdf

More information about air pollutant emissions from commercial aviation, regulations, guidance, and other information related to aircraft can be found on the EPA Aircraft webpage: http://www.epa.gov/otaq/aviation.htm

If you have further questions you may wish to contact EPA's Office of Transportation and Air Quality (OTAQ): http://www.epa.gov/otaq/oms-cmt.htm


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Topic Information
  • Topic #: 23002-22394
  • Date Created: 07:22:2004
  • Last Modified Since: 06:25:2015
  • Viewed: 2211

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